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Constraining Extended Scalar Sectors at the LHC and beyond
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We give a brief overview of beyond the Standard Model (BSM) theories with an extended scalar sector and their phenomenological status in the light of recent experimental results. We discuss the relevant theoretical and experimental constraints, and show their impact on the allowed parameter space of two specific models: the real scalar singlet extension of the Standard Model (SM) and the Inert Doublet Model. We emphasize the importance of the LHC measurements, both the direct searches for additional scalar bosons, as well as the precise measurements of properties of the Higgs boson of mass 125 GeV. We show the complementarity of these measurements to electroweak and dark matter observables.
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Cited by 2 Pith papers
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Search for pair production of additional neutral scalars within the Inert Doublet Model in a final state with two electrons or two muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV and 13.6 TeV
No significant excess found; new exclusion limits reach m_H = 108 GeV for m_H - m_A = 78 GeV in the Inert Doublet Model.
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Constraints on a Light Singlet Scalar from Combined Exotic Higgs Decays
Requiring exotic Higgs decays to two or three light singlet scalars not to exceed the SM Higgs width yields cos θ < 0.12-0.13 for m_φ < 40 GeV, with predicted rate limits Γ(h→φφ) < 0.06 MeV and Γ(h→φφφ) < 5×10^{-6} Me...
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